Unit One Test

10 Questions

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Electron Quizzes & Trivia

Questions and Answers
  • 1. 
    -   In order to advance to the level of a theory, a hypothesis should be 
    • A. 

      A. in alignment with past theories

    • B. 

      B. repeatedly confirmed by experimentation.

    • C. 

      C. Fully functional experiment

    • D. 

      D. Obviously accepted by most people.

  • 2. 
    - Matter is made of atoms that have positive centers of neutrons and protons surrounded by a cloud of negatively charged electrons. This statement is     
    • A. 

      A. an inference.

    • B. 

      B. Theory

    • C. 

      C. an observation

    • D. 

      D. a hypothesis

  • 3. 
    Which of the following ordered pairs of elements shows an increase in atomic number but a decrease in average atomic mass? 
    • A. 

      A. Ag to Pd

    • B. 

      B. Co to Ni

    • C. 

      C. Ge to Sn

    • D. 

      D. Cr to Mo

  • 4. 
    Why is cobalt (Co) placed before nickel (Ni) on the periodic table of the elements even though it has a higher average atomic mass than nickel
    • A. 

      A. Cobalt was discovered first.

    • B. 

      B. Cobalt has a lower density.

    • C. 

      C. Nickel has one more proton

    • D. 

      Nickel has fewer electrons.

  • 5. 
    - Generally, how do atomic masses vary throughout the periodic table of the elements?
    • A. 

      A. They increase from left to right and bottom to top.

    • B. 

      B. They increase from right to left and bottom to top

    • C. 

      C. They increase from right to left and top to bottom

    • D. 

      D. They increase from left to right and top to bottom.

  • 6. 
    Iodine would have chemical properties most like
    • A. 

      A. tellurium (Te

    • B. 

      B. Manganese

    • C. 

      C. Chlorine

    • D. 

      D. Xenon

  • 7. 
    Which of the following atoms has six valence electrons
    • A. 

      A. sulfur

    • B. 

      B. silicon

    • C. 

      C. argon

    • D. 

      D. magnesium

  • 8. 
    Which statement best describes the density of an atom’s nucleus
    • A. 

      A. The a. The nucleus occupies most of the atom’s volume a. the nucleus occupies most of the atom's volume and contains most of its mass.

    • B. 

      B. The nucleus occupies very little of the atom's volume and contain little of its mass

    • C. 

      C. nucleus occupies very little of the atom’s volume but contains most of its mass.

    • D. 

      D. The nucleus occupies most of the atom’s volume but contains little of its mass.

  • 9. 
    Which element has the same chemical and physical properties as Calciuma. N
    • A. 

      A. Na

    • B. 

      B. Cl

    • C. 

      C. Mg

    • D. 

      D. K

  • 10. 
    Which of the following atoms has the largest atomic radius
    • A. 

      A. barium (Ba)

    • B. 

      B.iodine (I)

    • C. 

      C. magnesium (Mg)

    • D. 

      D. chlorine (Cl)